Why does the sound make a low buzz on my Vizio Model M260VP when the resolution is on 1080? When it is on the lower resolutions the buzzing goes away ? This set is less than a year old

Does the buzzing noise come from the TV itself or the speakers?

Have you tested other devices and other inputs? Does it happen on all inputs with all devices?

Call the manufacturer to setup a service call if the problem happens with all devices or is still heard when the TV is muted.